Process for making paper boxes.



F. 1. MOTZ.

PROCESS FOR MAKING PAPER BOXES.

APPucATloN man FEB. 29. 1912.

1 136,479, Patented Apr. 20, 1915.

INI/ENTOH THE NoRRlS PETERS C0.. PHaTv-LITHOu WASHINGTON, D, Cj

UNITED STATES PATENT OFFICE.

FREDERICK J. IvIO'lZ, OF CINCINNATI, OHIO.

PROCESS FOR MAKING- IAPER BOXES.

To all whom. it may concern:

Be it known that I, FREDERICK J. Morz, a citizen of the United States ofAmerica, and a resident of Cincinnati, county of Hamilton, State ofOhio, have invented certain new and useful Improvements in Processes forMaking Paper Boxes, of which the following is a specification.

My invention relates to vthe manufacture 0f paper boXes and moreparticularly the kind known as knock-down boxes which are Vmanufacturedin a fiat or folded condition,

Fig. 2 is a crosssectional view ofthe rst ply in folded condition; Fig.3 is a view similar to Fig. 1 of the second ply of material; Fig. l is across-sectional view showing the folded first ply in position on thesecond ply; Fig. 5 is a cross-sectional view showing second -ply foldedabout the first ply, and Fig. 6 is an elevation of Fig. 5.

In carrying outviny improved process I take a number of rolls ofmaterial correspending to the number of plies to be ineluded in thefinished product and of a proper width to form the desiredcross-sectional area of bex and mount them in such a manner that thematerial may be withdrawn from each roll as required. The material whichis to form the inner or first ply is first fed along from the rolls in acontinuous sheet as indicated at 5 in TEig. l and is scored .by asuitable mechanism at the points where said material is to be bent toform the edges of the box, the scoring lines being designated as 6, `6,6b andG:l in Fig. l. After being scored as just described, the saidsheet of material is folded or bent upon itself along the scoring lines6a and 6c until it assumes the form shown in Fig. 2 the opposite sideedges of the strip being brought into engagement to form a butt joint 7.A tape or strip of material 8 is now pasted or Speccation of LettersPatent.

Patented Api'. 29, i915.

Application Vfiled February 23, 1912. Serial No. 680,745.

otherwise secured so as to cover the joint 7 and extend to either sidethereof and thus fasten said side edges in proper co-relation to eachother, it being understood that the strip or tape 8 is preferably verythin and light. An adhesive of any suitable kind is now applied in anyconvenient manner to the outer surfaces of the folded first ply -shownin Fig. 2 and the sheet 9 illustrated in Figs. 3 and i and intended forthe second ply of the product is fed along and scored as at 10, 10a, 10band l0c in the saine manner as was this first ply. If the finishedproduct is to consist of more than two plies the both surfaces of thissheet 9 are now coated with an adhesive otherwise only the inner surfacethereof is so coated or, if desired, the adhesive on the outer surfacesof the first ply may be relied on. rlhis second ply of material is nowbrought into contact with the folded first ply so that at this stage ofthe process the relative position of the second ply to the first is asillustrated in Fig. 4;, the scoring lines l0 and 10C registering withthe opposite folded edges of said first ply 5. The second ply 9 is nowbent along the said scoring lines l0a and 10C and folded about thefolded first ply as shown in F ig. 5, the opposite side edges of saidsecond ply 9 being also .brought together to form a butt joint llsimilar to the joint 7. The scoring lines 10, 10a, 10b and l()c on theply 9 are preferably so located and the said second ply 9 preferably sopositioned relatively to the folded first ply 5 that the joints 7 and 11in the double ply product will be located at different points or inother words in break joint arrangement. In other words the second ply isfed along somewhat to one side or out of registry with the first ply andthe said second ply is scored along lines in substantial registry withthe scorings of the first ply. This second joint ll is now also tapedwith a strip of material l2 of the same kind and in the same manner aswas the oint 7. It will be seen that in this condition of the two plies5 and 9 the scoring lines 6, 6a, 6b and 6 register with the lines 10,10a, 10b and l0c so that the finished box may readily be unfolded oropened to its .operative condition along these lines in the usual mannerthis same relative arrangement being followed if more than two plies arecombined together. As many more additional plies of material as may bedesired may be added in the same manner to the structure so far secureduntil the desired thickness of product has been attained, it beingunderstood that the butt joints of all the plies are preferably in breakjoint arrangement relativelyv to each other. After the desired number ofplies have been combined as described the continuousfolded body passesbetween suitable pressing rolls to press the various plies firmlytogether. After passing from the pressing rolls the continuous body isfed along and cut by suitable cutting mechanism of any well-knowndescription into lengths corresponding to the length of box desired.From thispoint the operations are Vvaried according to the particularstyle of box being manufactured and may be any of the well-known stepsadapted to produce the particular box desired.

It will be seen that the material necessary to carry out my improvedprocess may be secured in single sheets of any length mounted onv rollsor in any other convenient manner to be easily handled and may be placedin position to be suitably fed along and then combined to formcontinuous bodies of the required thickness, which bodies after beingbuilt up as described may beV cutV into any desired length, the materialbeing continuously fed from the rolls and the various steps of theprocess being continuously carried on, new rolls of material being sub-A stituted as fast as the old ones are used up.

This is in contradistinction to the usual process in which the sheetsare first cut into certain standard or fixed proportions andV thencombined to form the required num-A ber of plies, a step usuallyperformed at the paper mill, and after having been thus com-Y bined inthis manner are sold to the box manufacturers to be formed into singleboxes. It will readily be seen that with this last described'method agreat deal of waste of material may result while with the processforming the subject matter of the present case this waste is practicallyeliminated or at vany rate is reduced to a minimum. In

addition to this all the steps of the present process are performedbythe box manufacturer and can be instantly varied to suit therequirements of any-particular case. In the present processi't is forinstance easy to'V ''vary the length of the boxes, thusmaking -cure thedesired result. lt is also a simple matter to increaseor diminish thenumber Y of plies during an operation bysimply feeding additional sheetsof material or discontinuing the feeding of one or moreV sheets "i asthe case may be.

A box body constructed according to the 'present process when reinforcedwith Vtape is stronger at the joints or seams than at any other part ofthe box and requires less' stock on account of the buttrjoints and theavoidance of the usual lap. By forming the joints in break jointrelationto each otherV the strength of the body is further increased.The absence of the usual lap also The `finished boxes arepreferablyshipped in a flat or folded condition and j are unfolded or set up intheusual manner.

lt is, of course, to be understood that any sort ofclosure may beapplied to the body, that is, either a separate closure, flaps formedintegral with the body, or'any other form of cover which may be foundconvement: may be 11Std.y While I have shown 2;

described only the process of makingjths only the two ply box and havespecifically two ply` box,fany numberof plies of material may becombined Vby `simply carrying out my process and I Wish it distinctlyunderstood that I do not limit myself to two ply boxes or to a processAfor making two ply boxes. Y

Various changes may be made withintheY i scope of the; claims withoutdeparting from the spirit ofrmy invention. Y Y

I claim:

l. The process of making paper boxesVV whichconsists vin feeding acontinuous web of material and .scoring the same lengthwise lalong linesintended to form the edges of the boxes, folding said webfiiatly uponitself along some of said scoring lines as it Y advances, withtheopposite edges of said webv engaging each other to 'form a butt joint,feeding a second web of material along out of registry with said firstweb,

scoringsaid second web along lines in substantial registry with thescorings of said first web, bringing' said secondV web' into surfaceengagement with said fiat-folded first web, folding said second webalong some of Y its scoring lines into engagement with said folded firstweb and bringingthe edges'of said second web into abutting engagement ata distance from the butt joint of the first web, uniting said two` webstogether to Vform a flat unitary body and thenV cutting said flatunitary body into the desired lengths.

2. The process of making paper boxesV which consists in feedingacontinuous web of material and scoring the samelengthwise Y along linesintended to form the edges of the boxes, folding said web iatly uponitself along some ofsaid scoring lines as it advances withthe oppositeedges of said web engaging each other to forma butt joint,

applying an adhesive to the outer surfaces of said folded fiat web,feeding a second web of material along out of registry with said firstweb, scoring said second web "along lines Webs into a-at unitary bodyand cutting said flat unitary body into the desired lengths.

In testimony whereof I have hereunto set 15 my hand in the presence oftwo subscribing Witnesses.

FREDERICK J. MOTZ.

Witnesses:

HERBERT JACKSON, M. M. BRESNAN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents.

Washington, D. C.

